Tube Bending Services.
CNC tube bending for round tubes in stainless steel, aluminum, and alloy steel with tight tolerances.
Mandrel Tube Bending
Precision mandrel bending for tight radius bends without collapsing.
Rotary Draw Bending
Standard rotary draw bending for round tubes up to 2" diameter.
Custom Tube Bending Services
Tube bending consists of a series of manufacturing processes that alter the shape of a pipe or tube to create the desired geometry or features that meet specific requirements. In the process, tube stock is loaded into a bending machine which uses mechanical forces to push the tube against dies and rollers that cause the tube to conform to a shape.
Tubes can be bent two-dimensionally where the openings remain on the same plane or in three dimensions where they sit on different planes. Multiple bends are allowed in CNC tube bending, reducing the need to weld or fabricate a complex shape with elbow and straight tube sections.
Tight Tolerances
±0.125" envelope tolerance typical
Multiple Materials
Stainless, aluminum, alloy steel
Complex Bends
2D and 3D multi-plane bends
Fast Production
CNC automation for quick turnaround
Operational Logic
Sizes and Tolerances
| Specification | Value |
|---|---|
| Minimum Bendable Diameter | 0.250" (6.35mm) |
| Maximum Bendable Diameter | 2.000" (50.8mm) |
| Minimum Wall Thickness | 0.035" (0.9mm) |
| Maximum Wall Thickness | 0.188" (4.8mm) |
| Envelope Tolerance | ±0.125" typical |
| Linear Dimensions | ±0.010" |
| Single Planar Bends | ±0.010" |
| Multi-Planar Bends | ±0.030" |
| Angularity | ±2 degrees |
| CLR Tolerance | ±0.125" typical |
Materials
Stainless Steel 304/316
Corrosion resistant, ideal for outdoor and wet environments
Aluminum 6061
Lightweight, stiff, won't rust - ideal for aircraft and frames
Alloy Steel 4130
Extremely strong and tough for race cars and aerospace
Steel A513
General use - DOM for strength, HREW for economy, CREW for finish
| Material | Min OD | Max OD | Min Wall | Max Wall |
|---|---|---|---|---|
| Stainless Steel 304 | 0.250" | 2.000" | 0.035" | 0.188" |
| Stainless Steel 316 | 0.250" | 2.000" | 0.035" | 0.120" |
| Aluminum 6061 | 0.250" | 2.000" | 0.035" | 0.188" |
| Steel 4130 (Chromoly) | 0.375" | 2.000" | 0.035" | 0.188" |
| Steel A513 Type 5 DOM | 0.250" | 2.000" | 0.035" | 0.188" |
| Steel A513 Type 1 HREW | 1.000" | 2.000" | 0.065" | 0.120" |
| Steel A513 Type 2 CREW | 0.500" | 2.000" | 0.035" | 0.065" |
Tube Glossary
Welded
Made by rolling flat metal and welding edges together
Seamless
Formed without welding by heating and stretching solid metal
Extruded
Aluminum pushed through a die to create tube shape
Drawn
Pulled through a die to reduce diameter and improve finish
DOM (Drawn Over Mandrel)
Seamless tube drawn over mandrel for smooth interior
HREW (Hot Rolled Electric Welded)
Welded tube, less expensive for simple structures
CREW (Cold Rolled Electric Welded)
Cold-formed for better strength and finish
Advantages
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